package com.atguigu.facade;

public class Stereo {

	private static Stereo instance = new Stereo();
	
	private Stereo() {
		
	}
	
	public static Stereo getInstance() {
		return instance;
	}
	
	public void on() {
		System.out.println("Stereo on");
	}
	
	public void off() {
		System.out.println("Stereo off");
	}
	
	public void up() {
		System.out.println("Stereo up");
	}
}
